Well I guess I got the DIY bug and I'm now looking for some advice. I was originally considering the 18" High Q Tempest design from Adire. However, after reading this site I'm now really worried that its not what I'm looking for. Due to space concerns, the 18" cube 65L enclosure (2.5 cu ft) is about all I can swing right now. I've done some simulations using WinISD pro and I noticed that the Stryke AV12 is the most accurate with a 65L sealed configuration, at the cost of some SPL loss. The Shiva Mk4 is less accurate, but has about 4 db more volume and the DVC 12" and SAE1204 somewhere in the middle. I guess I'm looking for advice on what driver to get? Is the AV12 worth the extra $50 + S/H over a Shiva? Is there any other drivers I should look at? What would you guys recommend for a 65L enclosure? I'm looking for as accurate a sub as I can get, 50% HT / 50% Music which will be paired to Ascend CBM-170s. I'm not really looking for maximum SPL, just good overall sound reproduction?